meta-evb-ast2600: Add an new convenience layer for OpenBMC AST2600 EVB

This commit has been verified with AST2600A1 EVB with the image created
by the following command:

TEMPLATECONF=meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf . openbmc-env
bitbake obmc-phosphor-image

(From meta-evb rev: 9ec0661731103f703660aa65b5806a126a4f69fb)

Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Change-Id: Ie928880ed77ea77cecb33a900092f6ffc5454fb8
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/README.md b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/README.md
new file mode 100644
index 0000000..fd1e334
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/README.md
@@ -0,0 +1,9 @@
+Convenience layer for building OpenBMC on ASPEED AST2600 EVB
+================
+
+This layer allows you to build OpenBMC for AST2600 EVB in the Aspeed BSP layer
+without having to manually configure bblayers.conf and local.conf.
+
+The AST2600 is an ARM, service management SOC made by ASPEED. More information
+about the AST2600 can be found
+[here](http://aspeedtech.com/server_ast2600/).
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/bblayers.conf.sample b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/bblayers.conf.sample
new file mode 100644
index 0000000..f9f079a
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/bblayers.conf.sample
@@ -0,0 +1,27 @@
+# LAYER_CONF_VERSION is increased each time build/conf/bblayers.conf
+# changes incompatibly
+LCONF_VERSION = "8"
+
+BBPATH = "${TOPDIR}"
+BBFILES ?= ""
+
+BBLAYERS ?= " \
+  ##OEROOT##/meta \
+  ##OEROOT##/meta-poky \
+  ##OEROOT##/meta-openembedded/meta-oe \
+  ##OEROOT##/meta-openembedded/meta-networking \
+  ##OEROOT##/meta-openembedded/meta-python \
+  ##OEROOT##/meta-phosphor \
+  ##OEROOT##/meta-aspeed \
+  ##OEROOT##/meta-evb/meta-evb-aspeed/meta-evb-ast2600 \
+  "
+BBLAYERS_NON_REMOVABLE ?= " \
+  ##OEROOT##/meta \
+  ##OEROOT##/meta-poky \
+  ##OEROOT##/meta-openembedded/meta-oe \
+  ##OEROOT##/meta-openembedded/meta-networking \
+  ##OEROOT##/meta-openembedded/meta-python \
+  ##OEROOT##/meta-phosphor \
+  ##OEROOT##/meta-aspeed \
+  ##OEROOT##/meta-evb/meta-evb-aspeed/meta-evb-ast2600 \
+  "
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/conf-notes.txt b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf
new file mode 100644
index 0000000..2a88b8a
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/layer.conf
@@ -0,0 +1,11 @@
+# We have a conf and classes directory, add to BBPATH
+BBPATH .= ":${LAYERDIR}"
+
+# We have recipes-* directories, add to BBFILES
+BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
+            ${LAYERDIR}/recipes-*/*/*.bbappend"
+
+BBFILE_COLLECTIONS += "meta-evb-ast2600"
+BBFILE_PATTERN_meta-evb-ast2600 = "^${LAYERDIR}/"
+
+LAYERSERIES_COMPAT_meta-evb-ast2600 = "dunfell gatesgarth"
diff --git a/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample
new file mode 100644
index 0000000..ab109b0
--- /dev/null
+++ b/meta-evb/meta-evb-aspeed/meta-evb-ast2600/conf/local.conf.sample
@@ -0,0 +1,21 @@
+MACHINE ??= "evb-ast2600"
+DISTRO ?= "openbmc-phosphor"
+PACKAGE_CLASSES ?= "package_rpm"
+SANITY_TESTED_DISTROS_append ?= " *"
+EXTRA_IMAGE_FEATURES = "debug-tweaks"
+USER_CLASSES ?= "buildstats image-mklibs image-prelink"
+PATCHRESOLVE = "noop"
+BB_DISKMON_DIRS = "\
+    STOPTASKS,${TMPDIR},1G,100K \
+    STOPTASKS,${DL_DIR},1G,100K \
+    STOPTASKS,${SSTATE_DIR},1G,100K \
+    STOPTASKS,/tmp,100M,100K \
+    ABORT,${TMPDIR},100M,1K \
+    ABORT,${DL_DIR},100M,1K \
+    ABORT,${SSTATE_DIR},100M,1K \
+    ABORT,/tmp,10M,1K"
+CONF_VERSION = "1"
+INHERIT += "extrausers"
+EXTRA_USERS_PARAMS = " \
+  usermod -p '\$1\$UGMqyqdG\$FZiylVFmRRfl9Z0Ue8G7e/' root; \
+  "